How does a cardan drive or a planetary gear work? What makes a triangle the most stable shape in statics? And how can a pulley or a scissor lift mechanism be constructed? The STEM Mechanics learning kit answers these and many other fundamental questions of mechanics and statics – clearly, practically, and with a strong connection to the learners' everyday lives. Based on the four successful fischertechnik sets STEM Simple Machines, STEM Gear Tech, STEM Statics, and Mechanics 2.0, STEM Mechanics combines the content into a comprehensive educational concept with over 30 exciting model examples. Students build, explore, and understand, among other things: mechanical fundamentals such as levers, pulleys, inclined planes, or rope systems, various types of gears, e.g., planetary gears, differential gears, transmission gears, static systems: tensile and compressive forces, force equilibrium, bridge constructions, everyday technology like windshield wipers, cardan drives, or scissor lift mechanisms, practical measurement methods using a self-built spring scale. Through hands-on work, learners gain a deep understanding of mechanical and technical relationships. The set not only imparts subject knowledge but also enhances problem-solving skills, creativity, and teamwork. Online materials provide additional information, tasks, and didactic tips for teaching. STEM Mechanics is suitable for guided and free teaching – ideal for the STEM field from middle school to upper secondary level. It particularly appeals to tech-savvy students interested in mechanical engineering and engineering sciences. The key learning objectives include understanding mechanical principles, analyzing and applying types of gears, grasping statics and force equilibrium, uncovering technical applications from everyday life, and developing measurement methods and problem-solving competencies.